What are the IHS security training requirements?"

IHS Security Awareness Training can be taken at this site:

https://www.ihs.gov/ISSA/

All IHS information system users must take annual security and privacy training in order to fulfill federal mandates and regulations. In addition, all new users must successfully complete this course within 24 hours of receiving access unless the user has read the IHS Quick Guide to Information Security (IHS PDF), in which case they will have 30 days to complete the training. Failure to complete training requirements will result in the loss of information systems access.

Training Information Systems Security Officers (ISSO).
The training for ISSO's should include in-depth coverage of the threats and vulnerabilities related to their systems, techniques for detecting and reacting to incidents, and techniques for implementing Part 8, Chapter 12, "IT Security," Indian Health Service Manual in their environment. The IHS Manual can be found here: https://www.ihs.gov/ihm/index.cfm?module=dsp_ihm_pc_p8c12